100121202209977 has 4 divisors (see below), whose sum is σ = 107822833149220. Its totient is φ = 92419571270736.

The previous prime is 100121202209953. The next prime is 100121202209989. The reversal of 100121202209977 is 779902202121001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4103525312656 + 96017676897321 = 2025716^2 + 9798861^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121202209977 - 2³¹ = 100119054726329 is a prime.

It is a super-2 number, since 2×100121202209977² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121202209377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850815469602 + ... + 3850815469627.

It is an arithmetic number, because the mean of its divisors is an integer number (26955708287305).

Almost surely, 2^{100121202209977} is an apocalyptic number.

It is an amenable number.

100121202209977 is a deficient number, since it is larger than the sum of its proper divisors (7701630939243).

100121202209977 is an equidigital number, since it uses as much as digits as its factorization.

100121202209977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701630939242.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 100121202209977 in words is "one hundred trillion, one hundred twenty-one billion, two hundred two million, two hundred nine thousand, nine hundred seventy-seven".